[Amps] grid resonance

[Peter Chadwick]

Rich said
>Below the resonance freq. of the grid, it is difficult to make a g- 
g stage oscillate because the grid acts as a shield between the input  
and the output<

If the grid resonance is high enough ( for example, a tube with a grid collett, and a grid 'cage' construction so the inductance is very low) then if the anode circuit is resonant below the grid resonant frequency, the thing should be unconditionally stable if Terman is right. That suggests the only parasitic suppressor needed is a bit of inductance in the plate lead - which you probably get anyway.
This suggests that it would be easy to get another of these run away stories that totally changes the content to rubbish........
73
Peter G3RZP